Folding machine



YMay 13, 1930. B. ROBY FOLDING MACHINE 11 Sheets-Sheet l Filed July 14. 1926 /VVENTH EDWARD B. ROBY.

BY mm mm {AHORA/EY May 13, 1930.

Y. DB 2 mm. E.

M Mw Q 1r. A s t W e D e m E 1 1, 6 2 w 4 1 y l u J .d e l l n f May 135 1930. r;-` B ROBY 1,758,127

' FOLDING MACHINE Filed July 14, 1926 11 SheebS-Shet .3

| cAAAAl AAJ) l /m-/E/vo EDWARD B. ROBY.

ATTORNEY Mayls, 1930. EBfROBY y Y 1,758,127 l FOLDING MACHINE Filed July 14, 1926 ll'Sheets-Sheet 4 nvt/Enron I EDWARD B. ROBY.

Arm/MEV E. B. ROBY May 13, 1930.

FOLDING MACHINE Filed July 14, 1926 l1l Sheets-Sheet 5 EDWARD B. ROBY. Br

E. B. ROBY FOLDING MACHINE May 13, 1930.

11 sheets-sheer e Filed July 14 1926 EDWARD B. ROBY.`

By S50/dimm" A rroR/vfy May '13, 1930.

5E. B. ROBY FOLDING MACHINE.

' Filed Ju1y 14 1926 11 sheets-sheet 7 'EDWAR B. ROBY.

A TTOH/VEV May 13, 1930.- E ROBY '1,758,127

XU A' fr Tia-E l a I EDWARD aRoY. Y

' ATTORNEY May 13, 1930.

E. B. RQBY FoLDING MACHINE Filed July 14, v1926 11 Sheets-Sheet '9 nvm/TUR l .EDWARD B. ROBY.

A TOHNEY May 13, 1930. E. B. ROBY FOLDING MACHINE v Filed'J'uly 14 1926 11 Sheets-Sheetl l0 EDWARD B. ROBY.

ATTO/mfr May13,193o. E, B. ROBY 1,758,127

FOLDING MACHINE Filed July 14, 192e 11 sheets-sheet 11 'EDWARD B. ROBY.

Paieaiee May 13, 1930 `@Jiu:rEnes t EDWARD-BrnoBY; LOETRY, NEWf1YoRji;A-ssiei\if0iilrro s. ANDY-n.9 EOLDINGfMAoHaNirJ colar-'Anm` INC., oFgj` eiiEiniisLANm-NnwiYong; CORPORATION oF-NEWIYORKG Y The invention broadly yrelates to improvef" ments in folding machines and moreA specifi' cally'to improvements in foldingfmachines' of theitype ,wherein a; heated bed-plate, inf-y folders and ,a head oarryinga deoperate in. synchronism to fold a' blank. I in inachinesof this generalcharacter, thev die is ofa collapsible? nature, and the in-y folders are in the form of reciprocating slides.v Elie blank Vis initially pressed between the.l bed-plate andrtlie'die earriedby thelieadand the infolders then move in to fold the blank overt-he die. `lhefdieis `next eollapsedand. Withdrawn from enga-gement with the blank,` and, finally, the table is raised,slightlyv to press the blank against the infolders andfto completethe folding operationI Ameno' the principal ob'ects. which the present i'nil'enti'onhas in View., are Tofprovide improved means for jopelatlgthej,

Various element'sfofthe folding machine in synchronisni, toprovidea folding machine..

wherein synchronous motion is `impartedto ihefoldiiig elements fromV a Asingle shaft,v hereinafter termed' the main. shaft, Vthrough Canis and fother machine elements carried by said shaft; to' proyide, a' folding machinewherein the die is automatically causedto col-v lapse and expand; Vto generallyimprove the' constructionv of thecollapsible die; to provide noifel means for synchronousljgactuatinglthe infelders g to provideafresilient shock-absorbing connectionv between lthe bed-plate and fits actuating means te" provide-means Eforaiitof niaicalllv withdrawing the folded blank from-' the machine after thefOlding operation has been completed, to provide a frictionbrake A ioicontrolliiig the niovemeiitsoff-the Various folding elements; to provide. a safety niecha-4 nisin forprcventi-ng injury to Vthe opeiatoijpf the machine; fand generally to proifi'de iin? jirorements. in foldinginachines with a View, to 'simplifying and chapening -tli'efconstrucinoperation. Y

llVit-h :the above and' ;".otl`ieiobjfects f View, thefinvention Vfurther consists in the 4 arrangements of parts andde'tails of` construction more .specifically't pointed out the flloW ing description' of" the La'ccornpai'iyi'ng "d''aW- n tion and ofrend'eringthe'samelirore eii'cient j inthe;

1926..;v seriaifii. 122,307:

ings. foriningj a part fthisgsp ecicatijon and! W ieiieinlike*reference characters refertoth'ej same elements th'i'.oughout` the VariOuSgligj ur'es. v f. 'f

drawings lldligupre l fis a side ele vi/ationof thezniachine i withpart ofitlieframefbroken away-to shbW detailsof the automatic means for 'Withdraw Figure? isa front eleifationof'themachine,

17. i', V' -i A i' l ig .f 3 `is a plan View of the machine.

Figiire .isl 3,. plan YViewy but With' headf- Y removed "and the top platefpartlyfbroken bedplate and'to. la'fte, in elevation.

F igure .'Zisa. v l on' the. line I of; F

tion illustrated"infFigures. 8vftor12gv v p Figure 1.81 isaV sectional ,View of tlieghead;

`cam slioivviiig the safety.. device in elevation.

andA iiiitl/,iil thek 'avi/.aww v Fgiirel `with the fety vdevice ontf operation.:

Figu" e 2,0isaiviewi'siinilar:toifF: f buffi shim .the i safety l'device.ri-ni "operation Figures-2li I isrlaz-v bottoni@ Vi'evrfl of" the head? showingfthe character-olf'thefeollapsi le Figure 22- a horilziontalisection-v brought theheadf @ii-fthe linelQQ-F-Qof- Figure' 8l 1 vertical section ofthe machine Sip-s elevation of the saiiieffcailr erdetails ofthe infolde'r Co'nstrucf#i tical section, ofr'tlieinachine'f main shafflapaitially. broken` prior to its being subjectedto the folding operation.

Figure 25 shows the blank after. the lirst 'l folding, andv Y Figure 26 shows the blank after the second and vnal folding.

The machine ofthe presefritinverition is f y particularly adaptedto'be motor driven, al-

` though other types of drive may, if desired,

be employed. Asshownin the drawings, a-

horizontal platform isxbolted (in otlierwiseV secured to the frame, 10, of the machine near its foot. This platform preferably comprises two parallel beams, 11, and`12, of circular cross-section and a staging, 13,- carried by* the beams to which a motor,14, is attached. The motor drives av pulley, 15, onshaft, 16, by means of a belt," 17, which belt is guided by loosely rotating idle pulleys, 18,and 19,

.A member, 20, carries theidlepulleys and fis pivotally supported on shaft, 2 1, of ,the-

idlepulley, 19. Thisfshaft is, non-rotatably heldin position by arms, -22 and 23, carried character shown morefparticularly in Figures` .2 and 7 is employed.v The member 20, is prof' vided with a projecting arm, 24,tov which a 3o bybeams, Y11, and 12.-'-

In order to prevent the machine from rac-y ing, a foot operated friction brakeofthe link, 25, and a rod, 26, Vare pivotally secured.

in any sui-table mannera foot-piece, 29, for the operator ofthe machine. The, upper end of KAthe llink, 25, is

fastened to one end of alink, 30, theother end` of which ispivotally attached to the frame operator the pivoted link `is'also depressed,

A'rov of the machine. i The pivoted link, V30,is

partially curved to embrace the pulley, 15,v

and the exterior of the'belt driving the same. Whenthefoot-'piece is4 depressed by the and Vacts asv aibrake against the. pulley, 15,

and also prevents thebeltfromv coming oif. By means of this Afriction brake4 the. operator is enabled to'retain lcomplete control ofthe action of the machine at all timesjufj On the shaft, 16, there'is a'worm,"31,.which meshes with the worm gear. 32', keyed to thev main shaft, 33, of the machine and driving the same; indicated in Figure, 6,the main shaftis'sup'ported in bearings/34, and 35, carried by the frame ofthe machine. The cams f and other element-s for'imp'arting 'therequisite motions tothe. variousaoperatingfparts of f themachmeea're keyed tothisshafuf VAs shown 1n Figures@ and V7, a w1percam e 36is fastened*totheendoftheY mainshaft, 33:

. Thewiperacts ,upon aro'ller, 37, carriedby.'-y plunger, v38, which works within afsliding red n39: :The bedfllefefiea ,Oif, thermal-1in@ is threaded onthe top of the sliding rod, 39,' Y

which rod is mounted for reciprocating movement 1n bearings, 41, and 42prov1ded 'in the frame Vof the machine'. V"The bed-platel is sunkin a wall formed in the center of the machine.r It is adapted to be heated when the machineis operating. For this purpose, an electrical heating coil may, if desired, be

embedded'in it. The plunger acts upon the f sliding rod-k through a spring,- 43, ori other:-

yielding and,res1l1entmeans and causes in- Y termittent reciprocating movement of the rod anclbed-p'late as the wiper rotates. The

spring acts as a cushion for lthe bed-plate and absorbs any shocksy to which it Vmay be subjected. Y The head of the machine indicated 'generally by thenumeral, l44, is*- adapted to move in y synchronism withl the movements of the bedplate. Thehead is carried by a bracket,145,

Vwhich isequipped with two, armportions, 46,

and47'.V The arm portions are provided with r v l p bearings, 48, and 49, adapting them for slid-` l ingmovement onthe reciprocating rod, 39, l

and'onrod,"50. Theupper endof the rod, 5 0, Vfits in a bearing, 51, and the lower end carries A a flange, 52, which isboltedto the staging,

13, and maintains the rod, 50, fiXedlyin posi'-v Y tion. The bracket carrying'the head is guided iny itsmovements by an element, 53, which is attached to the upper partof the frame ofthe machine. y l

#B olted tothe arm, 46, of the bracket, `45, isa member, 54, whichser'ves as a carriage for theroller, r 55. Anotherroller, 56, projects mall i from an offsetportion, 57 ,lof therarm, 47 and 7 l is carried by a transverse'l horizontal shaft, 58', which shaftextendsthrough af'slot, 59, in thecffsetportion, 57,' and is lixedly secured to,

lever', 60. The latter is pivoted to the arm, r

47,` bya'bolt, 61. The roller, 56, can thus be adjusted by loosening the bolt and changing l the angular position ofthelever after which the bolt is tightened, it being understood that the shaft,'5 8, slides in the slot providedtherefor to permit this adjustment.

YVertical Ymotion'is. communicated to the `head throughY the bracket,`45, from the'm'ain shaft by a cam,"62, which acts upon the rollers, 55', and. 56.' The head is positively actuated? inboth directions and is causedto de- *Scend by the camacting upon the roller, 56

and to ascend bythe cam acting upon the roller, 55. The cam is provided with a safety Ymechanism to prevent injury tothe hand of theoperator should he be guilty of carelessness or .inadvertance inthe discharge of his duties.V This safetyfmechanism Willbe more' particularly describedhereinafter.

The head of the machine carries a die which is automatically caused to collapse at the correct stage ofthe folding operation and to be withdrawnfrom'engagement with the article being folded.HV

ro Metaal Shank, sais citmpeaas by a,

bolt, 64, a flat flange member, 65', which is one A, As shown in Figure 8,1the

ofthe die plates. shank" is made holloivthroughout a1' portion ot'its length andiits over' a male' element, 66,.

which' is driven through a hole' plate 67, and Wedged'therein.' vAL*.transverse pin, 6 8, retain's` thefsliank and its associated flange in place, andthe plateis fastened to theliead by;y

means et bolts, 69, V;-

Theplat'e has' out in it's surface a plurality of Tlsliaped or dove-tailed grooves which lre-V ceive"V slides, '1' 0. An L- shaped angleirom? 11,1 is rigidly bolted to each slide'.v Thesejangle irons 'carry flat flanges,72,' Whichtormthe collap'siblelplates of the die; Eaclisli'de ispro# vided With a' pin, 73, Which extendsthroiigli' slots, T11, in tli'e plate, 67, and'intoaihelical groove, 75', out' 'inthebottomofdisk, 76, Withinthehead. A sha.;t`t,` 77, is integrally 'formed ivitlifthe disk and eitendsthrough a journal' boX, T8, Ajsmallgearf'is ixedly bolted on? the top' fof ftlie shaft, fwhich gear meshes Witli a rack,'80.` Afgiiide, 81,yv'hicli is tastened to the head, bears againstthe back ot the'rack and holds it in mesh Withthegeiir.

Vhen the rack-is reciprooated, the geaizand thedislg'are oscillttted thereby, and, due tothe helical groove in the' disk, the pins, carried s by, `and operatng,"theslides, are movedr back andforthinjtheslots inl'the plate, and the slides and their associated angleii'rons' and 'f liange'sare moved With them. Y Thefdie'is thiis caused' to collapsejand expand by movement of the'rackff by'a bolt, 83', to 1 alinl, 8&1, and operated thereby. A linie, e5, is rigidfwiih iii-@11h15, si, and

tlie twolinksare pivotallymounted by a bolt,

86, on the bracket,` 45, :iiid'i'oim a bellciankf lever.- The tree end of the liiil,.85, is pr0.

yided with a roller,-87, which bears against the surface of a Cami, S8, ontliemain shaft ot the machine and is'yiel'dinlgly maintained in engagement therewith byja coiled springfSQ, onel end of whichis secured to the ybar ASQjaudthe other end to the braclet carrying the head.

equivalent devices. Y

(as's'hown in, Figure' 3 by means ot eyelets orf As the main shaft rotates, the"ca1`n, j8%,aow tu'ates theroller, S7, and impart-s reciprocet;

ingfniotionl to the rrack through thetliniis and the 'bar', 'ivliich` motioi'i ot the rack cai'is'es the die. carried by the headtoooll'ep'se index-` pand init-he' manner' Vheretofoi-e described.y

y Y z iiiinbeiot stages. Y Reciprocating. motion' is impartedtor theV 'rackrby'ai bar, 82, ivhichjis pivot-ally attached lag between the movementsotftlie levers'. The outer lever is firstmovedbythe cam .and `after a 'short lperiod 'of time the. middle lever is moved and finally atterjanother shortperiod ot time the'inn'er lever 'is moved. vThe reason torthe above construction'wil'l become `yepi'iarent"as the description proceeds, The levers are guided intheir movements. by flat bars, 07, .which 'are clamped' together in'- spaeedrelation by bolts, 98. V Tliefbers'are rigidlyfseciircd to' near itsA top.`

The` topsV of the traine ofthe' machine' the levers aref rounded otf'to form knobs, 99 which tit mortises inthe blocks, 100ivhich blocks arevfastened to .the

vversk 'oscillhte theylcaus'e a certainamountof rotation oif the rings Wl'iiohfslide fon ball bearing-S1025 Forthe purpose of illustration, I' 'lieve slioivnthe machine as adaptedV to fold a pad s formens oesters'. r:the shape oftheV blankis v,shown in Figure. The edges 103,are 'iirst`r folded their the edges, 1041i, are folded.V In order to produce these tolds,iit is only net :es-4

sarythatt'wo ofthe ringsbe employed and th eriietore the outer ring does not operate any befunde'rstood that with j blanks requiring three stagesV ci" folding, the outer .ring will be employed, and, infact,the'm'achine may'4 be equipped with anynumber of levers and rings to .perform oldingioperations offany s Three intolders, theV folded edges,v103, andk slide in'h guidevveys pi'o'vided'tlieretor inthe plate, 106, which isv `attachedA to the top ottheirame over a: plate,

10'?, Ewhich covers the rings.

slot 110,"throu'gh" which th'ejpins extend'. g is Il ring rotates counter-clockwise, as seen in l@ igiiree', diie to the actioiiof therockinglever, .the '.infolders, 105, are Vcaused tomove iiivvardbyftlie action otthepiiis in the oblique` 105, are usedlto produceY Eaoh'infolder, 105, isprovided tvithfan obliqueslot, 10S, intok which fit pins',109, which 'arecarried bythe t middle'ring". The pl-ate 106,I has Vcircular slots'jand. subsequent, elockvvi'sezrotation ,off Y thef ring.. will cause the iiitolders to move baelmard ont ot engegementivith the Vblankrij that is bein'gjf'olded.

plate, i'y 'These intolders arezoperated fin manner similar to the intolders, 105,:by-'thel acton. ot pins-. caiaiiedby the inner ringfzaind I'Similarly three intolders"111,areemployed f to produce the'tolded'edges 104,'.Whichin-foldl ers also slide; in@ f giiidcvfays provided j in the surface of thefra-meot tliemachine andcov kers 4meehinisms pist` describedi.`v The topf4 olate is"A cutaway` sii-fici'ently at'- its centertoi -i aiiow .ele tiene belgi-aided lr0- teL im@ againstthe bed plate andbetween the infolders. When the blank h as been folded, it is withdrawn'from the machine by a` .picker4 operating automatically and in synchronism with *the movements ofthe other elementsV and is conveyed tofachute, 113,whi`ch isattached to the `front ofthe machine and wherein the folded blanksare.collectedV` f The pickercomprises a Vrigid bar, 114, curved ynear its lowerendand vpivoted by a bolt, 1,15, to a'portion of the frame of the machine. vA thinA curved arm, 116, vextends; througha,hole'in the upperend of the bar P-and 'has aright angular bend, as shown in "'jFigui'e 2, so that it free end extends in the directon of the center of the machine.,v The free end terminates in a downwardly directed point and Athere is a small leaf spring, 117,

the end.k A small link, 118, is 'secured to that end of thearmthat projects through the barV so that the arm and the link rotate as a unit. A spring, 119is coiled fzaroundthe arm. One end of this is attached "to the armand'the other end to the bar in such a way as to urge therpointed end of the armin a downward direction. The link, 118,

- forms one of the'links of' a four-bar linkage, 3othe"other'three links being Vthe bar, 114, a "rod, 120,0ne end of which lis connected to y the link, 118, anda trigger, 121, 'which is pivoted lon the bar, 114, by a'pin, 122. To one Yend of' thetrigger the other'end of the rod 35.is, connected. The other end `of the trigger projectsin thepath ofa stud, 123, which is carried bythe wiper, 36. rllhe arm, 1-l6,fis

.only capa-ble of moving through a small an-` gle. Theextent of Aits upward movement is 40y determinedby a stop,124, which is attached ""to tho'bar.-114, and eoacts with the trigger, 121,- and the extent of its downward movement is determined by the stop, 125, which is also 'attached to the bar, 114, and coacts with the link, 118. y j- A Thev picker is provided vwith a dash-pot (Figure 23) which is of conventional structure and comprisesa cylinder, 126, within which slides aV perforated piston 127'.V `The ofpiston rod, 128, is attached .to the bar, 114,

V`'by means of a bolt, 129, and thedash-pot is pivotally secured to the suppor t,"130, jbya bolt,- 131. The dash-pot is allowed--toswing aroundthe bolt, 131,` as the picker operates; 5,5. The support, 130, has projecting .therefrom a.li1nb,'1'32 whichserves as a back rest for thepickei v A V Theretracted position ofthe picker Vis shown inzFigures 1 andf14, to which posi- GPj tion ,it is biased by gravity and rests against the limb,-132,'of the support, 130, As:V the wiper-rotates,l it carries the stud, 123, with it. Vhen the stud strikesthe end ofthe triggerlits lfirst resultV is to lift the arm, 116,V 65,. tto its elevatedposition. Further .rotation of in'Figures k13to`17 inclusive. Y y iFigures l8 and-13 ,show the position of thel 'parts at the c'ompletionof the folding oper-` ation. Thefhead has been lifted to its 'upper-L Y most positionk by the cam, 62and the wiper, V36, is so positioned that the bed-plateoisin its lowest position. The bar, 114, operated past the end of the'trigger, the arm, 116,

falls under the actionV of gravity and ofv the spring, 119, and the pointed end together with the leaf spring, 117, engages thejblank. The.

leaf spring Vretards the downward movement ofthe end of the arm and prevents the same from striking the blank, with such Yforce as Y togpunch 'a yhole in or otherwisey spoilithelv blank. VThe picker then falls back Vto its'retracted position and the blank'is swept into theucphute thereby. The dash-pot insures that'. a certain timeinterval shall elapse between; theftime that the .studl passes lthe `end of the trigger andthetime thatthe picker-falls back into` its retractedposition so that duri ing the intervalthe arm shall have dropped f g onto the blank. The coil,.- spring, -119, is .eml ployed to accelerate the speed ,withwhichf the ,arm falls when' released. Y.

The sequence of steps in the folding operae.

tion is disclosed Vin' Figures 8 to -12 inclusive andthe various positions ofV thecams and. y. i levers,correspondingfto these steps are shown' Y Aby the trigger., 121, and stud, 123,.had movedv Y Vthepicker arm, 116, in 'over the piece. The expansion ofthe diefcarried. by the head has"y been brought aboutdueto the lowering of the roller, 87, and link, 85, bythe cam, 88.

.The infolders are in their withdrawn position. The picker arm is'ready to drop down? and remove a folded blankand a fresh blank is shown resting, on the infolders where it., has been placed by the "operator` of the Inachine; i ,c "i

'l The studv now passes the end `of the triggerand the picker is -swungfto its retractedposi?l tion and carries .the foldedblank vwith it.

TheV bed-plate moves up 'and the head de- `scends under the 'action oftheir respective cams, andthe die pressesthe blankagainst thebed sothat the.' edgeslof theblank aref;` bent atrightangleaas shown in Fig'nre 9,. The infolders areV then moved in by therock-.l 'ing levers actedfuponbyfthe cam, V90, the Y infolclers,105,.iirst moving to fold the edges,

103 over th'e'die" and immediately afterv wards the'infolders, `111, moving to produceV the foldedlkedges, 104.2 The cam, 88,'then y raises the'proller, 87, as shown in yFigure 16, and the dieis caused to collapse and to Withdraw vfrom between the folds, as indicated', l' Y in Figure 11.4 Simultaneously, the bed-plate vis lift'e'dup slightly' higher ybythe wiper,f36,

against the infolders.

raised, the infolders are Withdrawn, the bedancl presses the folded edges of the blank tinuously supplied to the'bed-plate so thatV bed-plate, die and infolders serve to iron the folded blank'and it is ready foi-"the sewing machines as soon as it is Withdrawn.

tions to prevent it from lowering the head should the hand of the operator be beneath it. TheV upperk roller, 55,l Vbears directly on the cam surface but the lower roller bears on a ange, 133, fastened to the side of the cam.4H

This flange extends partially around the cam' and its outer edge conforms substantially to the contour of the cam. A tapering dog,V

134, which is pivotedtothe cam by a bolt',

tinuation of the flange. A lever, 136, ispivequivalent means. One end of this lever is bent and extends through a slot, 137, in the A side of the cam and is fastened to the rear of the dog. The other end of the lever is. bent atan oblique angle and extends throughY Va hole in the rim of the cam in the pathof the descending upper roller, 55.7

As the cam rotates, the dog 4under the action of gravity tends to assume theposition shown in Figure'QO. When the head descends the roller, 55, strikes the oblique endl of the lever, the dog is moved to the position shown in Figure 19,.and the roller, 56 is caused to bear against the outer surface of the dog and flange, and the head is positively moved downward thereby. If, however," the hand of the operator, or other obstacle should be in the path of the descending head, the head would be arrested in its descent, the roller, 55, Would not strike the oblique end of the lever, and the roller, 56, Would ride on the inner surface of the dog and flange. The

head, therefore, would not be ypositivelyv caused to descend, but would, Von the con* trary, be maintained at an elevated position sov that the operator-of the machine could easily disengage his hand Without serious injury to same.

in the above described machine Without departing from the spirit of the invention and I desire that it be construed as limitedV only by the state of the prior art and the scope of the appended claims. i I claim Y 1. In a machine of the class described, a frame, means carried thereby` operating` in i synchronism to fold a blank, a rigid bar pivoted to a part of the yframe and biased `to its retracted position, a singlearm pivotally at# tached to the free end of the bar and adapted Finally the head is ferri Lhavng! ein., Louter sd'aiidf ,an inne? l `means forjfiuine 'the'. rroietmgamembeli t0 ride. pnelthelt osaid aides, said. means' beine lterations and va-riations'may be made y to; assume.. a; rasedand leweledrestien,.the ".freeenid Qf .Said efmbeinelextnd down- .means for Positively pmevne Said bari, t0 :its

advanced position While maintaining ,the arm Y y vthearmfto siveep,thejblankffroni.thelniachiiie. The cam,.62, which operates the head, is" provided With a safety device Which func# .foted to' part off,y the y-jfraiiie and :biased toi its 'to the free wend fof the .b'ar, la trigger fpivi otally secured tot-he barnear its pivote'dfeiid,

. ,ared.. r i .eratively coheetnathe. triage? and 135, in one position (Figure. 19) forms a. con" Y anni', anldfthe have 1f91irbar'-lnkeae; .means otally secured to the cam as by a pin or other f linkage,a sliaftinountevdiin Ythe ,frame-of the y,1i'iachine, Vmeans for rotatingsaid shaft, and

for limiting the movementof :said ffoiirfba r a vstud, rotating ,Withl the ,shaftfand:adapted lto engagethetrigger to `-move the bar, to :its yadvaiiced position.

cause operation of the bracket nd lftla" l 'operative ,ini'aecgifdanc withiwiieuier 'or not y an atta-@Cie is .in the. path Qi niet@ 15.3111amaclillebf .tlieffclass'descii edifa the head, twoE .armjs ca'rriedfbyflthe bracket,

cam 'disposed betv'zeen` thetvvo .a'iinshnieans for .rotating said cam, a ydog pivotallyat V tached to the,cam,and a lever also pivotally to cause operation of the bracket and head,

a rotary member including a Hange, said .flange having an outer side and an inner' side, and means for causing the projecting member. to ride on either of said sides, said meansy including a pivotally-mounted dog,

and means operated inV accordance With Whether or not an obstacle is in the path of the head for controllingk the dog.

7. In a means for folding the edges of a blank over a die, a plurality of slides,'a plu-` ffralitylof concentric rings,operative-conne@ Y tions between the slides and rings, and means v A for rotating the rings` successively Vinfpre-l determined synclironism to move the slides y successively.`

(ifi

sively, i

l 9.-111l a ing the levers successively.

forr folding the edges of a: blank over a die, a plurality of slides, a Vplu- Y rality. of concentric rings, Yoperative connec, A Y vtions between the slides and rings, pivoted' Y levers for frotatinglthe rings, l'and means for;

-y rocking the levers successively in predeterf mined synclironi'sm to move the slides succes- Y rmeansor lfoldingV the edges of a .blank-over a die, a plurality of slides, aplu- Y i 'ralityof concentric rings, operative-connec- Y tions between the slides-an'dsrings, pivoted lever'sffor rotatingitliferings, aisingl'e sha-ft f vforniounting tlie levers, and 'means forrock-` n 105.111' ia machine, fon foldingY 'a mank; "a fdisk 'liavingasingle yspiral slot extending;

spirally vfrom the 'centen of the disk, a pluy rality of slides 'radiating'k and'extending radially from the :center-'of the disk, said slides Y being adapted tonjperform a foldingopera- A l tion `uponsaid blank, pins'associated with the slides and extending into said slot, and.Y

means for rotating said disk around its cen-l ter as an axis.'

'11. In a machine of tlieclass described, a` Vframe, means carried thereby'operating in synchronismto fold a blank, and autimiatic meansfor removing the folded blank from moving the arm inover the blank, 'allowing it lto fallontheblank, andretracting'it to "sweep theblank fromtliemachine, and means comprising a leaf spring mounted :adjacent the end of the arm to cushion the contact of the arm Witli'ftheblank. L

In testimony whereof, I have EDWARDS Roer `the-machine, comprising'a single arm having n adoWnWardly extending free 'end,means for Signed .naine to Athisv specification this 30thY day' 0f June-l92 6`.y .l 

